Spring mattress corner bracket or corner block



March 25,1941. GISSKE 2,236,055

SPRING MATTRESS CORNER BRACKET OR CORNER BLOCK Filed June 15, 1938 INVENTOR. WALSFER GhssKrs ,Z MMMFXMA ATTORNEY$ Patented Mar. 25, 1941 UNITED STATES PATENT OFFICE SPRING MATTRESS CORNER BRACKET QR CORNER BLOCK Application June 15, 1938, Serial No. 213,761

1 Claim.

My invention relates to improvements in a spring mattress corner bracket or corner block. The object of my invention is to provide a spring mattress corner bracket so shapedand provided with suitable strengthening means that it may be made as a metal stamping, and still provide adequate strength to meet the extreme stresses placed upon such a bracket.

Another object of my invention is to provide a spring mattress corner bracket made of one piece of drawn metal whereby to provide one integral box-like structure having great strength.

In the drawing: Figure l is a perspective of my corner bracket installed in a somewhat conventional type of spring mattress and disclosing the corner of such a mattress and the corner of a metal bed frame in conjunction with which my corner bracket may be used.

Figure 2 is an elevation of my corner bracket and the portion of a cross bar of a spring mattress thereupon.

Figure 3 is a plan view of my corner bracket.

Figure 4 is a vertical section on line 4-4 of Figure 2 and showing a portion of a stretcher bar in position in the lower end of my corner bracket.

Figure 5 is a section on line 5-5 of Figure 4.

Figure 6 is a section on line 6-6 of Figure 4.

Figure 7 is a side elevation of a portion of a bed frame and a mattress showing my corner brackets.

Like parts are designated by the same reference characters throughout the several views.

In the usual bed construction, a corner post H] is spaced and braced from the other corner posts by a longitudinal rail II and by a head bar I2. A spring mattress, indicated generally at It, includes a longitudinal stretcher bar l4 and a cross bar IS, the cross bar l5 being oif-set upwardly from the stretcher bar l4. Between the cross bars l5 a spring mattress I6 is stretched and kept under tension by suitable springs I! which are hooked between the mattress and the cross bars, as indicated most clearly in Figure 1. The mattress I6 is thus supported at some distance above the rail II and the stretcher bar Hi to provide for free spring action of the mattress Without danger that it will impinge upon any members which might obstruct the spring action.

My corner bracket 20 supports the cross bar it in proper relation to the stretcher bar l4, and at the same time provides a foot 2| to rest upon the rail H and thus support the entire mattress structure I3.

Many forms of corner brackets 20 have heretofore been provided, but attempts to provide a successful bracket in the form of a metal stamping 5 have not been successful in part because of the terrific strains which are placed upon the bracket because of the tendency to distortion exerted by the springs H and by the weight of any object upon the mattress l6 tending to wrest the bracket from its connection with the stretcher bar I4.

I have provided in my bracket 20 elements of extreme structural strength which meet the problems which have heretofore discouraged the use of pressed metal brackets.

My bracket is in general a box shaped metal stamping including a back wall 22, side walls 23 and 24, and end walls hereinafter described. At the upper end of the box a portion of the back wall 22 is inclined, as shown at 25, and the upper end of the back wall 22 is bent inwardly in an end wall 26 to provide a cross bar seat for the cross bar [5 which is secured in position by rivets 21, as shown in Figures 2 and 4. This end wall 26, being drawn into its position from the material oi the back and side walls lends extreme strength to the bracket structure. To increase the lateral stability of the box I turn the side walls outwardly at 28.

At the lower end of the box I provide side wall extensions 30 and 3| which comprise extensions of unequal length. Extension 30 is'corrugated, as shown at 32, and is bent to dispose the extension 30 across the face of the channel, and to extend therebeyond to form a part of the foot 2 l. The extension 3| is bent outwardly and parallel to extension 30 to reinforce extension 30 and to provide increased strength as a part of foot 2|. The portions of the extensions 30 and 3| which lie parallel to one another may be spot welded or otherwise secured together to increase their stability as a foot which may rest on the rail II. By thus securing the extensions 30 and 3| together, I also brace one side wall of the box with reference to the other. 45

The lower end of the back wall 22 is shaped as shown most clearly in Figure 4 to provide a shelf and a seat at 36. The lower margin of the extension 32 is shaped as shown most clearly in Figure 2 to receive stretcher bar 14, which consists of an ovoid tubular member against which the curved surface 34 of the extension 32 may abut and into the shelf of which 35 it may extend, 35 also preventing the ovoid tube from turning and thus securing a rigid total assembly. The seat 36, referred to above, is in reality an end of the box since it is drawn from the side Walls and from the back wall 22. Thus in forming the seat 15] for the stretcher bar l4 there is added strength which I provide in a curved end wall of the box.

At spaced points in the back corners of the box, and extending somewhat into the back wall and into the side walls thereof, I provide ribs 31 10] to increase the shape holding strength of the bracket 2!]. Ribs 38, to strengthen the back Wall 22 of my bracket are also provided as shown most clearly in Figures 2, and 6.

No particular means for securing stretcher bar 15 M in position upon the seat 36 and upon shelf 20 14 may be welded or otherwise secured together From the above description it will be seen that I have provided in a stamped metal corner bracket tremendous strength to withstand the great 25 strains thrown upon a structure of this kind.

The cross bars [5 and stretcher bar [4 are adequately supported from and by one another, and by reason of the provision of the various parts, as described, each element is strengthened in a 3i) manner not heretofore possible in the construction of corner brackets. At the same time I have provided a product which is light in weight, having a cost of manufacture lower than previously used brackets, and having rigidly actually greater than of malleable castings heretofore used.

Much of the strength which I have provided in my new corner bracket or corner block is obtained by drawing the ends of the walls and the bottom of the box into an end wall integrally and the integral drawn metal, even though light in cross-section, lends tremendous strength to my completed product.

I claim:

A spring mattress corner bracket having a stretcher bar and a cross bar, said bracket comprising a generally box shaped stamping having a channel portion, the lower end of which has side Wall extensions of unequal length, the longer of said side wall extensions being formed across the face of the box and extended therebeyond, the shorter of said extensions being extended parallel to and secured to the longer extension beyond the box wall whereby to reinforce the longer side wall extension and provide a foot, the portion of the longer side wall extension extending across the face of the box being cut away to provide an edge to abut the stretcher bar, the end of which is received in the box, and a lip extension of the lower end of the channel being inturned to provide a seat for said stretcher bar.

WALTER P. GISSKE. 

